Quick Verdict
Both kits pair the 018-312-EKD D-seal with the 018-341 EK base seal, with the same 35-foot length and the same money-back-or-replacement after-sales policy. The real decision here is which title you want when you're scanning for parts: the straightforward "Combo" name or the explicit "2 in 1" name. They're so close that the choice rarely comes down to performance.
Price and Specs at a Glance
| Product | Price | Price bar |
|---|---|---|
| Combo RV Slide Out Seal 018-312-EKD & 018-341 EK | USD 63.99 | |
| 018-312-EKD 018-341-EK 2 in 1 RV Slide Out Seal US | USD 65.99 |
Both products share the same seal dimensions (1 x 15/16 x 35 feet and 1/2 x 2.75 x 35 feet), the same black color, the same new condition, and the same easy installation method: slide the D-seal onto the EK seal base and screw the rubber into place.
Where Each Product Wins
The Combo kit wins if you want the straightforward "Combo" name and you don't mind checking the product title to confirm both pieces are included. If you tend to order after confirming part numbers against your old seal, this is the simpler way to go. The 2-in-1 kit wins if you want the title to do the explaining: "2 in 1" immediately tells you both seal sections are part of the same order, so there's less guesswork when scanning a list of similar RV seal parts.
Product Notes
Combo RV Slide Out Seal (018-312-EKD & 018-341 EK)
The Combo RV Slide Out Seal is the lower-priced kit in this head-to-head at USD 63.99. It brings together the same 018-312-EKD D-seal and 018-341 EK base seal as the 2-in-1 version, with a black rubber finish and a new condition. Installation is straightforward: slide the D-seal onto the EK seal base, then screw the rubber into place. The "Combo" name tells you that two seal sections are bundled, but it doesn't spell out the "2 in 1" arrangement as loudly as the 2-in-1 version. That's the main trade-off: you get the same two-part setup for a little less money, but you'll need to check the full part numbers in the title to confirm both the D-seal and the EK base are included.
018-312-EKD 018-341-EK 2 in 1 RV Slide Out Seal (US)
The 2 in 1 RV Slide Out Seal costs USD 65.99, and the "2 in 1" phrase in the title is the clearest clue that you're getting both the 018-312-EKD D-seal and the 018-341 EK base seal in one order. The installation steps match the Combo kit: remove the tape from the 018-341 EK seal, slide the D-seal onto the base, and screw the rubber into place. It also comes in the same black color and new condition. The limitation is the price: it sits $2 above the Combo kit, and the two sets of specs are essentially identical. If you want the explicit "2 in 1" label, this is the one; if you're purely price-focused, the Combo version is the better choice.
Final Choice by Use Case
If you're replacing a worn slide-out seal and you already know your rig takes this two-section kit, either option will work. Choose the Combo kit if you want the straightforward "Combo" title and you're comfortable confirming the two-piece setup in the product name. Choose the 2-in-1 kit if you want the explicit "2 in 1" label to avoid any guesswork. For most RV owners who just need the rubber and don't care which label is on the package, the Combo kit is the more straightforward buy. Before you order, match the markings on your old seal to the title of the kit you pick.
